screencasting: Add an autotest
Adds an autotest that makes sure a screencasting stream works as expected. Adds an optional dependency to KPipeWire only effective to run the test.
Draft because it depends on !3598 (merged) and !3611 (merged)
Adds an autotest that makes sure a screencasting stream works as expected. Adds an optional dependency to KPipeWire only effective to run the test.
Draft because it depends on !3598 (merged) and !3611 (merged)